Telegraphic receiver.



l2 SHEETS-SHEET 1;

' Patented June 5,1917;

Ivfl

L. M Fons. T ELEGRAPHIG RECEIVER. APPLICATION FILED JANIG,

WWLALJ 19i t-HQJSQQ H L. M POTTS. TELEGRAPHIC RECEWER. APPLICATION nuzuIAN. B 1914.

Patented June 5, 1917 12SNEETS-SHEET 2 'ZETuilEn- 7 APPLICATION FILEDJAN.8.19H-

L. M. PUTTS. TELEGRAPHIQ RECEIVER.

12 SHEETS-SHEET 5. v

its,

Patented June 5, 1917,

L. M. POTIS. TELEGR APHIC RECEIVER. APPLICATION FILED. an. a. 1914. r

31 0i F u macs l i manufacture as is commensurate with operammo sT-Arns' ra ENT OFFICE.

LOUIS MAXWELL ro'r'rsor BALTIMORE, MARYLAND, AssI'Gnon '10 gans'rmMcLANAHAN; or aamrmonn, MARYLAND;

Paris, a citizen'of the United States, residmg at Baltimore city, Stateof Maryland,

have invent'ed certain new and ll-SBfjllllmprovementsfin' TelegraphicReceivers, of

' which the foll'owin is a specification.

The prlmary Qb eetof this invention is its the production of apageprinting telegraph receiver which shall .be ofas .low cost to stingefiiciency; which shall be free from liability to get'out of order andreqnireas little adjustment from time to time as possible, and whichshall be readily adaptable to use on present day commercial telegraphcircuits.

, Lon cost of mplnufacture is attained in magnet constitutes a theentire electrical .the present machine by a great reduction in parts,and by devising and designing these parts with a manufacturing endinview.

. JCertain'ty of.-operation and'the reduction: of adjustments areobtained primarily by eliminatin the electrical factor as far" aspossible. fin-the present machine a single uipment.

Adaptability to present day commercial circuits ispattained by placingall the operations of the machine under the control of a single magnetso that the machine may be readily substituted for the usual sounder ina. Morse'circuit without requiring any other change inthe receivingapparatus, or any change in the currentor line equipment; by

V providing a machine which shall operate on 3 a. code at least as shortas the Morse, and by providing a machine which is adapted for useWithout change on a line operated aeeording to the Morse American closedcircuit method as well as on a line operated according to the opencircuit method.

In order to more fully describe my invention, referenee'will be had tothe accompanying drawings wherein:

Figure 1, is a front elevation of a page printing telegraph receiverenlhodying one specific form of my invention;

Fig. 2, an and elevation thereof, with the selector ren'lo'ved t Fig. 3a diagramillustrating the princition of said machine;

magnet 'rELEGRArHio 1 'REGEIVEB.

ple of the combination disks,- andalso show-' Patented June5, 1917.

ing the combinations employed for the i'afl' rious signals; 1 Fig. l, avertreal central sect onal eleva- Fig. 5, a .detail- 'vert1calsectionall-eleva tionof the clutch-onthe main ower shaft; FigT'IB, afront elevation o one off the Fig. 7, a fragmentary sectional elevationof the timing mechanism and controlling Fig. 8, a detail fragmentaryelevation of parts of the timing mechanism; .Fig. 9, a fragmentarydetail sectional elevation of parts of said timing mechanism;

Fig.-10, a. detail fragmentary bottom plan view of the controllingmagnets and cooperating parts; W

F 1g; 11, a detail sectional elevation, showing the limiting stop forthecontrolling -armature;

Fig. 12,a detail sectional plan view of parts of the timing mechanism;

Fig. 13', a sectionalfelevation of parts of the selector mechanism forstopping the type wheel shaft, showing the said parts in their normalpositions of rest;

Fig. 14, a detail sectional elevation, showing the selector mechanism ofFig. 13 in its operative position;

Fig. 1.5, an end elevation of the selector;

Fig. 16, a detail sectional elevation, showing certain parts of theselector mechanism and certain parts of the control mechanism in theirnormal positions of rest;

Fig. 17, a detail sectional elevation, showing the parts illustrated inFig. 16 during a stage of their operation;

Fig. 18, a. detail fragmentary elevation of parts of the timingmechanism, shown in Fig. 1:);

Figs. 19 and 20, detail elevations of the escapementmechanism of thetiming device:

Fig. 21, an enlarged detail fragn'iontary perspective view to illustratethe co-aolion between one of the combination tulnlllers and itsassociated selector lever;

FiguQQ, a detail top plan view of the lac-tor tmnhlers n'lountecl intheir supporting frame;

Fig. ill, a developed View showing the outline and setting of thevarious combination disks on their shaft;

Figs. 28, 29 and 30. detail views of the positive coupling between the.combinatio disk shaft and the type wheel shaft;

Figs. 31 and side elevations of the type wheel as viewed from. oppositesides;

Fi 3-3, adcveloped. view showing the outline and setting oithe variouscontrol disks on the type wheel shaft;

Fig. 34, a detail fragmeiitary sectional side elevation of the rollerclutch of the control shaft;

Fig. 35, a vertical section on line 35"35", Fig. 34;

Fig. 36, a fragmentary dctailelevation of a portion of the control shaftand control cams mounted thereon;

.Fig. 37. a developed view showing in Side. elevation the outline andsetting of the va- .rious control cams and disks on the control 5 shaft;

F i g. a detail fragmentary sectional clevationpf parts of. the paperfeed mechanism ;f

Figs; 39, 4O and/ll, are detail views of the correcting wheel ratchet,and a memb r of the clutlih shown in Fig. 38;

Fig. 42, a. detail sectional elevation of parts of the paper feedcontrol mechanism;

igs. 4-3 and 4-24, fragmentary detail scetional Views to illustrate theoperation of the col'itrol roller clutch and associated parts, Fig. 43,showinr said parts in their normal position and Fig. 4.4. showing themin the operated position;

Fig. 4-5, a fragmentary sectional top plan of the rout-rel nuwhanisnilocated within the casing atthe right hand end of the ma-- chine, saidview showing said casingrcinovedg I Fig. 4-6, an end elevation oi themachine, looking at the right hand end thereof. with the, casing'llifll'll'lUlUSi'S the control meclur; nism rcn'ioved Fig. 47. a.detail lragnnintarv perspective view to illustrate the uinsliruction andop oration of the printing. spacing. carriage return and paper feedmechanisms;

Fig. a detail fragmentary top plan Q (mu;- Win-15 i and print hann'oerreturn control slide:

Fig. 49, a deve ped view showing the shaft of the selector;

outline and relative positions of the various control slides and pawlsshown in Fig. 47;

Figs. 50 to 53, inclusive, are detail views of certain parts employed inthe operation oi. syncingaud returning the type wheel and print hammerto the conn'nencement of a line;

Fig. 5-l a developed View showin the outline and relative setting of these ector cams and. other parts mounted on the timing 15 Fig. 55, afragmentary detail sectional elevation, showing the parts illustrated inFig. l mounted upon the selector timing shaft, and also showing theselector timing 30 shaft friction clutch;

'Fig. 56; details of the positivecoupling between the selector timingshaft and its clutch;

Fig. 57, a front elevation of the control. disk operated by the selectortiming shaft which also forms a' part of the coupling illustrated inFig. 56;

Fig. 58. a fragmentary detail perspective view to illustrate theconstruction and op oration of the type wheel-shift mechanism;

Figs'59 and-60, perspective views of .two of the control slides employedin said shift inech a n ism Fig. 61, a fragmentary detail perspectiveview of parts of the mechanism shown in Figf 58; I I

Fig. 62, a detail fragmentary elevation showing parts of the type wheelshifting nieehanism';

Fig..63, a current diagram illustrating a. system of signals which maybe used with this machine:

Fig. 64, a diagram to illustrate the appliration of this machine to theusual American closed circuit method of operating lllorse;

Fig. 65, a diagram showing the-applicalion of this machine to theEnglish method;

Fig; (56. is a diagram illustrating one way of operating thetransmitters of Figs. (5% and (151 so as to send signals such asillustrated in Fig. (33.

'lheoperations of prin ti ng, spacing, lining, returning to thecommencement of anew line. and shifting the type wheel from one set ofcharacters to another are. in this machine. all under the primarycontrol of a selecting: mechanism located at one end of the machine, andwhich is separatelv' de- 120 tachahle a whole from the hodv of themachine without disturbing any of the parts.

This selecting mechanism as here shown comprises, among other parts,(see Figs. 7 to 25) a magnet I mounted for. vertical adjustment l) amilled screw 2, upon bracket 3. made last to a fiber block 4 which formsone end ol'- the selector casii'lg'. The sides of (his casing consist oflwo. u'ictal plates 5 and G llt'tWBQ-l]. which the block 4 ands 30similar b1ock '7, theylatter forming the othe ,end oftheorising-Farerigidlyheld. ;;.;.The magnet provided Witlijtii arma t ea wh c s p vo ly uPPP w "be 't'v'veen'b ao'kt s' 9 p milled, screwontrol the operation other parts, a' balance 14 fast upon a shaft, :15journiled for rotation in plates and "6. This balanc when released,'oscillates under the control of a helical spring '16, having one endrigidly fastened to the bail ance fat" 17; and'the other end clamped, asat 18, to a circular plate 1-9 rigidly' secured by lscrewsflB'. to theSide 6 of the selector cassif ing; The screws 19 pass-through slots 195in; plate 6,f0r permitting adjustment of jplzttef'lflandspring 16..(See Figs. and 1:8)? number of turns in. this spring is .-awholenumberlaeking approximately 90,

; according'to welllmown practioe in chronofiijterj{'tiudtflre Thefsizeof the .h'fisirid'epiing, and the weight of-the mplete (forward andback) oscillation of 5 one unit'impulse o f-the signal. This period o foscillation is chosen merely as being-the most convenient, and is notnecessarily essen-' 'tial. A unit impulse could correspond to a'quarteror other period of the oscillation .0f the. balance. It is, however,important ,itliat the unit impulse correspond; to some .,-'multip of theperiod of the balance. The

hereinafter more fully described. Thebalance has on its circumferencetwo mcan time screws 20, which are used to bring the-balancecto thedesired standard, and, thisis 'done' by choosing screws of the properweight. -If the balance is too fast enlarger screw is inserted; if tooslow, a

a smaller screw isvused. v

Also inserted in the rim of the balance are Rharacter of thesesignalimpulses will betwo rating screws 21,.located about 90 from '.the screws20. Screws 21 are used forthe purpose of changing the rate of themachine 1n words per minute to adapt it to different lengths of line anddiflerent operating conditions.- The balance is so constructed that ithas a rate equal to the maxi mum'rate deso sired,v andthis rate isbrought down to that rcquired in any particular case; by theem-"ployment of the screws 21,0fga size correspending to the articular raterequired;

The power-W ich actually 0sc11latcs the 6,5 balance is transmitted to itthrough an estends througha pm;- d into a the selector cas-' itectorzelements and the start-' this jtimingf device comprises, among lii'ce' 1a are so chosen thatone-half of a" the .balan'cepccupies the timenecessary for "cape meiit mechanism comprising an escape heel 22, fastone square shaft23 hereinfast-on. the said rollerand adapted toenage a3'notch28 inthejlower end of the anchor, and asafety 29 adapted to engae --;pa.ss1ng hollow 29' inthe sa'fety roller. Th s escapementmechanism, issubsta ntiall y the lever same as j that commonly known theescapement used in the clockjand watchi g art, so need not here he morefully described. I'-

1 Escape wheel 22 has siirteeth, so thatthr ee' 30 l completeoscillations of the balance willallow the timing shaft 23 to rotateone-half a) revolution, .whicli is the length of time re-.

quired for the rece tion of a complete si nal.

The startin" an stoppin of the ba ance' g5 is controlled irectly by a side30 mou1ited for vertical movement in slotted stationary guides 31 and32supported by' plates 5 and '6, and is backed up atyits' lov'ver endbya stop 33. ,This slide is atfall times under presa sure downward of aspring 34:, and is provided with a nose which at times is adapted toextend into the ath of and be engaged by a stop arm 35 ma e fast to theperiphery of the balance. The nose of this slide is s lit as 5 at 36 torender the same slightly yiedable when struck by the stop arm 35. "Inthe normal position of the parts, the balancel l; is at rest with stop35 against the noseof slide 30, as-shown in Fig, 7, at which time spring16 is under torsional stress. p

Slide .30 s provided near its upper end a Wltl'i an arm 37 having a noseat all times in engagement undertension of spring34, withthe peripheryof a cam 38 fast on timing 5' shaft 23. In the normal or position ofrest of the parts, thenose of arm 37 engages one or the other of twodiametrically opposite depressions-or notches 38, in the periphery ofcam 38. no

Slide 30 carries a depending arm 39' pivoted thereto as at 4:0, and thelower end of this arm is movable in a guide lmade' fast to slide 30.(Sec Figs. ,7, 8* and The arm 39 is at all times held between the 1 armsof a; yoke 42 formed on the end of an armof a bell crank lever 43. r I

, Another arm 44 of this bell crank lever is provided'with a nose whichrests-upon the periphery of a cam 38 which is a duplicate of cam 38 andtherefore provided with two diametrically opposite peripheral notches 38similar to those of cam 38. The nose of arm 44 is held againstcam 38'under tension of a spring 45. Ga n 38'', is fast on shaft23 and ISalongside and adjacent cam 38.

The-noses of arms 37 and 44which engage with cams 38 and 38 respectivelyare rela- 'tively staggeredso thatwhen said cams rotate together, cam 38will act toraise the fter "be referred toasithe timing shaft;

I'fastQ n shaft, 15; an impulse pin in the upper face of nose of arm 37slightly before cam 3t acts in a similar way upon arm 44;. The reasonfor this will appear later.

In the normal position of the parts, as shown in Fig. 7, the lower endof arm, 39 lies 1 t above the upper edge of armature 8. The auction ofthe arm 39 and its operation in connection with its armature 8 will helmreinafter fully descriliied.

The movement of armature is limited by a slotted block -16 secured toguide 32 Figs. 10, 1] and 13). I

In addition to starting the timing mechanism, the armature of: magnet lselectively controls the operation of a series of selecting levers 46,46", 4:6, 46 and 46-m0untecl in guides 31 and 32- respectively. I

n the lower end of each of these levers is formed an offset or foot 47adapted, as hereinafter described, to cooperate with armature S, andmovable each in an individual open and slot 4-8 in guide 32. Iii-thenormal position of lovers 4:6*-l6, as shown in 13, the lower edges offeet 47 are slightly higher than the free end of armatu re 8 when thelatter is in-its normal or down position, and the feet 47 are of suchlength as to permit the end of tho armature topass up in front of themto the position shown in Fig; 14 Armature 8 is broad enough to spanthe'feet of all the selecting levers aswell as arm 39, as shown in Fig;10.

Each of the levers 4616 is provided near its upper end with two lugs 49and 50 between which is formed a space into which extends anedge of theguide 31. Each lug 49works in an individual. open end slot 51 guide 31,and in addition to serving as a guide or support forits lever,cooperates with a locking pawl 52, as hereinafter more fully described.There is Zone of those pawls 52 individual to each $e-- let-ting lever,and they ,51 with their respective levers, and all pivot- 45"are'mounted in slots ed upon a common fulcrum pin 53 carried by guide31. Each pawl 52 is under pressure of an individual coil spring 54 whichare within holes drilled in the guide 3 Levers 4(i"-46 can move outwardor to the left (Fig. 13) in the guides 31 and 32 at either the top orthe bottom, but are nor-.

mally held back by springs 55, one for each lever.

On the inner edge of each levcr IS 10* is formed a cam lug 5'3, thefunction of which is to cooperate with a series of fire cams 57*, 57*,57, timing shaft 23, and lying in the samevertical planes respectivelywith levers -tt6"--46. 'lhcso can-is 5'T--57" are all of the some shape,but are so mounted on shaft that. succeeding ones are angnlarlydisplaced 30 lichiud the preceding one about the axis of said shaft. andare held against lateral movement by collars The staggering of 57" and57 fast on the cessix'cly engage cam lugs 56 on the selecting levers,and ii armature were in its down position, shown in Fig. 13, thefoot-ofeach of said levers would be kicked to the left by said cams.But, if at the time when cams C T"=-57 ei'igage levers Mn-46, magnet lhappens to he energized, armature 8 will then he in alinement with feet47, as shown in Fig. 14, and instead of thelevers 46-46 kicking to thel-ft at their lower ends, the a v upper ends 0?: said 'levers will moveto the left. In other words, each of the levers 4-6-l6 s cape blc of twodegrees of motion, but is i' des-sure n1 twp degrees, cams 57-57 tendingto operate said levers in succession, and arnnuture *selectirely actingto positively lock said lovers from motion inthe direction of restraintand compel motion of these levers in a direction of greatest restraint.'lherefore, the upper ends of these lovers will be kicked to the left/incombinations corresponding to the impulses received by the magnet 1.

Lugs 56 of the selecting levers are so positioned that cams 5752' engagethem slightly after said earns have passed their horizontal position.These cams are, however, stopped by the escapement in the horir'ontalposition, lugs 56, and consequently the middle of the sent impulse, sothat cams 57"-57 'do not apparently engage lugs 56 until somewhat afterthe middle of the sent impulse. But due -to the in g in the operation ofme I this actually occurs at about the middle of the impulse. By aproper location of lugs 56 and the slip of the clutch. at shaft 23,hereinafter described, it may be brought at any desired point of theimpulse. The cams 5757 of course engage lugs 56 only during a small partof the time occupied in the transmission of a unit impulse, and by beingtimed so that it occurs in approximately the middle of an impulse, themargin allowable for the mutilation of the signal in'its transmission onthe line is large as it is only necessary that the impulse shall be goodduring the interval in which any of the cams W -57* engages :1 lug.

The function of selecting lcvers!46--t6 is to control the setting of amechanical comhirmtion device which in turn controls the setting of thetypewheel shaft, and on this setting depend. whether a character shallbe printed and which character is to be printed, the operations ofspacing, lining,

returning to the connnenecmcnt of a new clued from movement by unequalwhich position is the middle ofamong; other This combination. devicecon'lprises,

parts, a. series of tumblers. 59,

59", 59 and 59 eech ofwhich comprises a stem on which is formed a. head,shown most chiefly in Fig. 21, having twooppoposed cams 60 and 6iseparated by a. "s 62.; mi upwardly extending lug 63, and u horimuitullv tending lug" Gal", thelfu'nction of which parts will presently appear.

ell curried byan angume comprising two slde These tumblers lerly.l'uovuble l lien 65 and 66, and webs or platesfi? and 68 connectingthese.

tumblers rest upon web 67, and are held down thereon by e rod 69extending across The stems of all the their to} s Each of thesetumblerstermimite brcuider t Ill the stem o;E thetumbl'erf and feet extends mtoa pair of sees 'l'l, mformed in the for ward edge ol. a. yoke piece 73which slips over the web 6"? and a. horizontal. square rock shaft Til:journ'aled in plates 5 and 6 of the selector casing.

.The parts 68; 7 3. and 74 erejheld' together 7 by a. series of pins 75.These pins serve also as posts to which are attached respec,- l tivelycoil springs 76, one for each tumblc'r., The other ends of these-springsare attached respectively to upwardly extendinglugs 77 on'the tumblers.These springs at all times exert a pull on the individual tumblers in ithe direction of shaft 74 so as to hold the lug 6 on each tumbler hardagainst the forward edge of'the web 67.. The distance.

between the inner edge of lugs 64 and the In Figs. and 22, tumbler 59 isshown in the shifted position, and the rest of the extreme rear end ofeach tumbler is such that there is u sligltit clearance between the.rear end of the tumblers and the bottom of recesses 71, 75.. Each ofthese tumblers has anormal position of rest from which it is ungularlymovable in a "lane parallel-to the web 67, on the yoke 3,es a. fulcrum.

tumblers in. their normal positions.

For the purpose of locking the tumblers in either oi? these positionsagainst accidental displacement, the forward edge of web. 67 is providedwith a, series of pairs of indentations 78, 79 (seel igs: EA and eachpair (.(lli'lflSlNillMllllg to the two positions of rest of a. tumbler.effected by the engagement of these indentetions with the lugs 68 on thetumbler heads. The u 'eb 67 also bus on. its forward end series of?projections 80 which positively Y prevent any overthrow of the tumblersin shiftil'ig.

The shifting or setting of these tumblers, above described, effected byselecting levers erur, and for this purpose each such lever i'l'ir'i'ivided at its upper end. with two oppositely disposed. cums 81.and 82 (see Fig. 21) adapted to cooperate respecut its reur end in afoot 70 somewhot' has half of its circumference high low, but; thearrangement-of these andlSO low in extent; earns, 84;

.bination of said ,positions of rest' tion-of this combination device isshown i This locking is chine.

latera I The function, of tumblers 59*;59 is to; interlock. by means oflugs 63 with of pairs of combination cams 1843.84"; 84, 84; and 84?,and-thusto control-the stopping. of the type wheel shaft in-the desiredpo-L sitio'n.

,For each of seid tumblers there is one "peir go of suchca-ms, or'tencams 1n all for a com- -'ple'te' machine. Theshape's of these are shownmost clearly ingFig. 27. In all I cases the open part of one 'camc'orresponds to the closed part of its mate. Each cam and half,

parts, is different in each set or pair's of cums. The cams 84.,forexample, are each -180"high p I have two 9 90" scctionshigh and-twowse'ctions low; the cams '84, four sections'high and four low, etc. These"camsare all mounted fast on a. shaft 85journeled in plates 5 fand 6 endare all so spaced angularlj about t-h axis of said shaft thet forenypossiblet' l? t e. tumblers,- there will be one position '1 only onewhere all thelugs 63 on saidtuma blers will find-an opening'in all thecams which they engage. The cams 84- -.-8 4 ',may" assume a. variety ofshapes difierent from] those shown, so long as the satisfy, abovecondition. The princip e and opera;

5 diagram Fig. 3, hereinafter moreparticua larly described. i Mountedfast on the same shaft with cams se -s4 is a. ratchet 86. having a toothfor 'ench stoppi'n position of the shaft. This 114,1v ratchet is a optedto be engaged at tim by a. pawl 87 on flange 65 of the tumbl frame, andwhenso engaged holds shaft 86 against rotation. i

Plate 6 of" the "selector casing is screwed. 115 flnt against the outeredge of eflange 88 formed on a plate 89 secured in, an upright positionfast to the top of base 90 of the 1118.1

Flange 88 forms a. casingfor certuin parts to be presently described,while 12:: plate 89 formsone of the ends of the mam, frame of themachine, the other end of which comprises a plate 91 made fast in anupright position to Fig. 1). i I

The motive power for driving the machine is preferably derived from asmall electric motor 92. secured to the rear of the frame of themachine. This motor drives continuously a main power shaft 93, through139 the .top of the base (see' a, series 15 Clish pinion 9-1, a train ofreduction a, 9Q, 37, 98, a fri ion clutch. c i

5 and 6), This friction clutch coinpi alt 1 m 98- asfthc memberpositively driven from the source of power, a flange or tlisk 99 forlimitin the lateral movement of gear 98 in one clirection, a laterallymovable friction click 100 adapted to lie :llatt against one face ofgear 98, a spring 1.01 forcing gear 98', and said gear ag flange 99, anda collar 102 a1 rangei'l to hold spring 10l nuclei comprcs sion andscrewed tight on a collar 09' on the power shaft. The (lisk 99 integralwith or i'i idly secured to collar 99" and gear lliose on. said.coll-(tr to both thereon anti Love lntcs'itlly. jllii'iction J; 160 maymove late ally, out is con-- (l positively tolsaio'. shaft to rotate ithpin? 1. 3 on collar 99" cngaginp' radial slots 10 in the central o)ening 1.05

of said disk. This clutch constimtos a sltfcty device for preventing thebreaking of Darts hy the sudden acciclcntal stopping o the power shaft.\Vith this clutch arrange ment, shaft 93 could. he suddenly stopped inany position, and the motor would con- Inn to (lllVG gear 98with-onttransmitting l po'wor to the driving shalt, clue to the clutch.She; E1 how is intendccl to rotate contii x '1' or: shaft drives thening; 55l1flfi] rough a friction clutch and coupling shown most clearlyin Fi 55, fit; 5'2. friction clutch CGIHPE} es gear 186 as the normallyrotating member of the clutch, and this gear meshes with a pinion 107{see Fig. 52 fast on power shaft 93.

Gear 106 is loose to both rotate and slide laterally on a collar 108rotatable on a. stud. 109 fast to end plate 91 One face of this gearlies flat against a disk 110 screwed tight on one end of collar'108. Theopposite face of gear 106 is engaged by one face of a friction disk 111which is laterally IDDVELlJlC on collar 10, but which is pre'vnntctlfrom to tating thereon by pins 112 on said cellar engaging riidial slotsin the friction glisk in the case of the clutch shown in Fig; Friction:lisk 111. is held against the face 5311 1% a ,llllfl 11.? hold a V sionbetween said (link and a fin plt v V integral with collar" 108.

in the end of collar 108 formed. a re- 115 anti two radial slots 116.(Sec Figs. 2 and 5?). When the selector (pal-ts embraced betweensidcplates anal 6) attached to the machine frame, as described, the'ht[1 of a male coupling member 117 fast on timing shaft 23 engages recess1'15 in'the end of collar 108, and two radial arms 118 on this couplingmember engage slots 116 of Faairl collar so that positive di'i lionbetween ti u anal collar iota as shown n l igthe ty :3 wheel El and.nari 'lng the combination (llf in, ,a cm;

l esee soe connection may 1) ing the select Gear 10 5 rotetei; nontiiittiming shaft is 1T =)lijl: rotation; As soon as relcz timing shaft willtal: the friction (l'it'itt friction disks ill), J Gear 106 also :nemountcil to rotate a ant-mind to tho oral cl (Fi and this goal. in turnlife on idler 121 which illlVES thev shalt 1:22, through a l'zrici'ionchit most; clearly in l? 26. i prises as the normally To thereof, a gear123 which 1' ion Iii Ti, and, this a, collar i241? (lea? 123 adapted toth 12 i and move .lllt" v r how,

"tat-ion from ill-f5 an;

motion being limited in one (lime collar 125 screwed tight on one andAtlanta to he lint up other face of gear 123 is a lriction dish 126which is held. from notation on collar 124 by pins 127 engaging slots indisk 1% in a manner similar to that employed in the sham in detail llFig l Ila n'm'iilei at its Qllll opp a flange 128 between whi I ing ismule? (01. i556 against th ace.

' tl ve driving connect (see'l igs; 28, 29 alul 30) min m sing a, (a

pling member 129 last on the typo \i'hcel shaft, and a coupling; member130 test on shaft Menthol 1331 001:1 i i a dish haw ingtwo flanges l3lPill'fltfifl by slotSv 1 32, Menthol 130 comprises a tiisl; having twolugs 133 adapted to engage with slots 132 in the memberlQf). e

This coupling, like the coupling hotween timing shaft and its power chaialso may he disconnected by merely rnn'ioving the selector.

The typ: ln'it o 'hou the wheel shaft 122 is sown-o length, hotinoinalgcfi o m i ilo-S and ill oi? ti o 3 0 by moans o'l' voila 1'hearings l J35 flint on Fiflld sl'ialt.

.'1=Vl(l(1 i with shoulders. abutting against iilatcs anti 9i, analacting to ])(.V0flij lateral n'zovement ol saiil. shaft. 1 I Tn'c typowheel 126 is movable. longitncli nally of shaft 122. and. for thispm'pos is last on a sleeve 137. having a. square hove which makes asliding lit with the typo wheel shaft.

This typewhcel, for i asons which will i" roinaxl'ter move inll appear,pi'ovilezi th two parallel t r outlying one oi typo, fll'l l the i totypefivh'eel travel across 'themaliine' ;for perniitting a platen,hereinafter. described, .15 to strike the paper opposite the desiredtype The paper 138 passes over a series of-fr1c tin feed 1ollers 144.145,14651fast'0n a'sheft 147' journaled for'rotation 'in the end fie-mes I 7 8915:1116! BLsn'd the paperis held down upon gg' 'these' rollers'by two presser rollers 148; 149, Qextending irely 'ecross thepaper,- and rotatably" ted'in .two' 'pivotal1y supported arms-I11rid-151. 'hrmsiso and '151-a're fast .res ely (on individual I shafts152, the two .end'me nhers 89 and I iachine fraine; and, the f'p'ressereheld down against the paper- 11ntensien oi two coil spiing's1153 whichnarms O. and- 151 throu'gh arms .1 resp'eetilvely'to shafts 15.2 In theI but one'ofthe shafts 152 springs 15 anga'rms 151 is shown, it-beingunderstood thiit thiseonstri etion is merely duyplic'zited atjlthetwo'ends of the-machine. I jf 'l -lieedgefof the type wheel travels be Ia jjftween two fogkihembers of a. spring p'resser plate 155 (see 4) 'Which travels across thepaper with the: type .Wheel and holds the pa erdownlin the' immediate neighborhood vone end 'to-a'sl'eeve' 156 .whi'eh'is. mounted as hereinefter .'described to travelacro'ss the paper withthe ty e'wheel. The type whee is inked 'by ail-felt. lnk roller 157mounted on 'a spindle 1'58 rota-v ..ta'ble inopen end s1ots159 in aasihg160" which almost colnpletelyfcoverg sei d roller. I This .eonstrilctionpermits th I I I 1? tojbe I readily removed-iron; and ihsert 59 support.I Casing 16Qfis 'p1 v0tal1y, mounted between" two brackets 161 end'162formed on the, sleeve 156 and the ink rolleris. heldf against the typewheel nndertension of coil s ring 163 (see Fig. '1'). Also attached toseeve 156 is a pointer. 16-1 which is. adapted to travel over a scale 165beneath which the) paper passes. I I For the purpose of compelling feedroller. shaft 147 to stop in a definite position on" 0 each step, thereis mounted fest on this shaft 1; correcting wheel 166 having twelveperipheral notches adapted to engage with the pointed nose 167 of a pawl168 held against said vheel under tension of a spring 169 (see Figs.38-, 39 and 42). Corlest the "p-fiiltin is? .1 e' pgrt g pl t 9. e topof a casing-ex d; front "140.. "The papg is 1 sleeve 1 2 fittin oversleeve178; his mg. aknob 183 I est" thereon; jfSl've II where it servesas a chamber for spring 184 carried iponjfaserew 1 8 5 'screwed into theend of she ft1 ,knob 183 to the right and then til" iI 1 the normal-t1ve1y connecte thereof.; This resser plate" is made fast at comprises,among other parts, (seeFig..1-2)'T 'a slide 189 havin near'oneend'and-'onits 1 's i n -mm a: W a f t 147 b Jpn-171: I

enfsaid extens n outside said frame '1- sleeve 172; This's1eev" isprovided' at one h i 3' nefh f n qua tends beyond the'fouter end-s Di -ts1 spring is under" compressionrbetw n the end of sleeve 178*anda WQSherlfifi'edjacent the screw head, said sprin at nu-inns tending to forcesleeve 178 to t elef t' (Fig. 38) so as to hold 1511152175 and 176 n"en-i gegement with two of the slots174 *Therpurpo'se of this constructpermit the shaft 147 to ,be'; djseomieev 1mm itspower meohanism and; g I11 th hand, which latter is done hypu I the desired amount; As long asthe position; sleeve. 1'78 I to shaft 1:17" I I clutch members 173',175,. 17. ,{177, and the; engagement .of screw 179fwithfjslot Lateralmotio'npf sleeve 172F011 sh the . I I uts' 105. against end'plate91*0fthe 1naehine- 'm'e', sleeve 172 cooperates: with wheel I topreventlateral movement of shaft in either direction. t '1 i I The paper feedshaft 147 is powe lr- 11o ated through a ratchet 188*fast'jon vs 172. vThemechanism for operating this ratelif'et 1'15 upper edge a paw tooth190 adapted tojensl gagewith the teeth of ratchet 188. Thisj";

'. slide. is .mountodforj longitudinal move;

ment intwo slotted guide siipports 191 and? 1192 extending outwardhorizontally fiom 12o end plate 91 of the machine frame to which theyare rigidly attached.

Slide 189 issupported at. an] an'gle of about 35 from the horizontal;a'ndfjitq lower nd rests on support 1.91 inthe bottom of its. guideslot. The upper end" of this, slide. however, rests upon a il1193, and

the edge of the slide which is a antedto engage this pin is cut away esat 194 so as to I permiththe pawl tooth 19pm clear; the

47"exte i;sthrough"frainegiiifiiind d ratchet 188 when the slide movesto the right Fig. 4-2. When at the extreme mp1 of its travel forward orto the left, pin 19 engages an elevated portion 195 of the slide, whichjams the tooth' 190 against ratchet 188 and prevents overthrow.

Tip 197- of slide 189 engages the'periphcry of a cam 198 mounted fast ona control shaft 199, and the said tip bears against said cam under-thetension of a coil spring 200 attached at one end. to a lug 201 on theslide, and to a plate 202 fast to the support 192. A pin 203 fast onslide 189 engages a slot 201 in the lower end of a lever 205 fulcrumedon a pin .206 in a. slotted guide 207 fast to the frame plate 91. Theupper end of this lever is provided with a nose 208 which is capable ofresting against the pe riphery of a disk 209 or dropping into slots 210or .211 in the periphery of Said disk, depending upon the stoppingposition of said disk. This disk is fast on and rotates with the typewheel shaft outside of end plate 91.

In Fig. 42 the parts are shown in their positions of rest after theprinting of a character.

Control shaft 199 rotates one revolution for .each signal received,while the type whee]. shaft rotates different fractional partsofarevolutionfor'each different signal and stops in the selectedposition. Let us assume that the signal received is such that when the"type Wheel shaft stops, neither of the slots 210 'or 211 is oppositethe nose of the lever 205, Control shaft 199 will, in such case, makeits usual revolution, carrying with 113C211] 198, and when the drop 198of this cam passes up 197 of slide 189, said slide will pass toward theeam'under the pull of spring 200, but its movement in this direction isvery limited owing to the fact that it is stopped by the engagement oflower nose 208 with the periphery of disk 209. Slide 189is thereforeprevented from pass. ing far enoughto the, right (Fig. 42) for the pawltooth 190 to pick up another tooth of its ratchet and when th-is'slideis again returned Ytoits' initial position by'the cam 198,

itdoes so. without rotating the ratchet 188,

and, therefore, without affecting the feed roller shaft. If, however,either-of the slots 1 219 01 211 stops opposite lever nose 298, the disk209 no longer forms an obstruction to the travel of theslidefl89to'therighti as the' drop of cam 198 passes slide-ti 97, whiehcase saidslidetravels sutliclently n the-direction of the cam 198' to. allow pawltooth190 'topiok tipanother tooth o'f-rateh'et 188,,"h'r1d'as'a1n 198continues its rotation,

it will send slide "189 to thelefl; (Fig. 42) causing it to rotate the.ra tche t:1 88, and, therefore, the paper fecd'shaft' 147, one step,

' or the distance from one line to another. In

addition to causing'slide 189 to-travellongitud'inally, as described,spring 200 being at tached to said slide below its points of sup port,will cause the ratchet tooth 190 to press against its ratchet 188.

Control shaft 199 is journaled for rotation in the end plates 89 and 91of the machine,

and is held against lateral movement by two collars 21:2 and 213 fastthereon. (See Figs. 34; and 36.) Rotary motion is imparted to thecontrol shaft, from power shaft 93 through pinion 107, gear 106, gear119, a gear 214 fast to gear 119, a gear 215 (see Fig. 2) and a rollerclutch shownimdetall in Figs. 34; and 35. This clutch comprises, amongother parts, a driving member having a sleeve portion 216 rotatable on.shaft 199, and an integral cup shaped portion 217. near 215 slips overthe outside of the sleeve 2'16 and is made fast to said driving memberby pins 218. Within the cup 217 is a small disk 219 having a. hub with.a square opening throu h its center which fits a square end 220 o shaft199 so as to rotate with said shaft. This disk has four flattenedfaces221 on its periphery, and an annular channel 222, the purposes of whichwill appear later. The hub223 of disk 219 has a cylindrioal periphery onwhich is mounted a disk 224 rotatable relative to disk 219. This dishenough so that a sli ht displacement thereof circumferentially o theclutch Will cause it to make contact with both the inside of cup 217 anda flattened face 221 of disk2l9.

A spring 228 in channel 222 is connected at one end to disk 219, and atits other end to disk 224:, and exerts a tension between these diskssuchthiat rollers 227 are always tendin to jam between cup 217 andfiattened aces 221, but such action is normally prevented by abell-crank pawl 229 en a lug 230 on the periphery. 6f dis 224, whichprevents disk 224 from rotating coun ter-clockwise. I

Control shaft 199, and consequently disk 219, are held positivelyagainst clockwise movement by a pawl 231 (Figs. 2, 43 ended) heldagainst cam disk 234 under tension of i a coil spring 231" and adaptedto engage either of two stop shoulders 232 or on a disk 234 rigidlymountedon the. square-p617 tion 220,- of the control shaft Therefore, aslong-as pawl-231 en either of the shoul ders 232 or 233 on" is 234,rollers227 will.

be prevented from positively connecting cu- 17 and disk-.219. Thecontrol. awn vs therefore at: uch time normally remain sta tionary, butcup 217 and gear 215 will continue to rotate under power from shaft 93.

